Toyota Corolla (E120) 2002–2008 Repair Manual / Diagnostics / Sfi system / Oxygen sensor heater control
circuit...
Toyota Corolla (E120): Oxygen sensor heater control circuit...
Dtc p0031 oxygen sensor heater control circuit low (bank 1 sensor 1)
Dtc p0032 oxygen sensor heater control circuit high (bank 1 sensor 1)
Dtc p0037 oxygen sensor heater control circuit low (bank 1 sensor 2)
Dtc p0038 oxygen sensor heater control circuit high (bank 1 sensor 2)
Other materials:
Inspection procedure
1 Inspect transmission wire(s2)
Disconnect the transmission wire connector from the
transaxle.
measure the resistance according to the value(s) in the
table below.
Standard:
2 Check harness and connector(transmission wire – ecm)
Connect the transmission connec ...
Replacement
Hint:
installation is in the reverse order of the removal. But the installation is
indicated only when it has a point.
1. Remove luggage compartment door cover
2. Remove rear spoiler
remove the 2 screws.
disconnect the wire harness connector.
put protective tape.
&nb ...
How to proceed with troubleshooting
1 Vehicle brought to workshop
2 Customer problem analysis
3 Check and clear dtcs and freeze frame data
4 Problem symptom confirmation
Symptom does not occur: go to
step 5
Symptom occurs: go to step 6
5 Symptom simulation
6 Dtc check
There is no
output: go to step 7
There is outp ...